How do you prove mental abuse in a relationship?

I think that it is very difficult in most if not all states and court rooms. I do think that mental abuse is far worse than physical, which is recognized. Physical abuse, can heal more quickly. Emotional, sometimes never does. To prove, you willlhave to start a journal or some type of documenattion process. You will have to write down everything that happens to you in that documentation and keep it hidden. Over time, you will hopefully have enough documentation to show a habit, or trend and the courts may look at that. Othewise, keep yourself safe, and If it's your child or a child that you are trying to keep this from happening to, just fill their heads with the right way to be through demonstration, and positivity, and will grow up and be able to leave and make their own choices one day.